Keller, who is out for the season, tore his ACL, PCL, MCL and dislocated his right knee on the tackle by the Texans rookie safety during Saturday’s preseason game.

Swearinger, who went low on the play because tackling high can lead to a fine, delivered a legal hit on Keller. A point that NFL vice president of officiating Dean Blandino reinforced in an interview with NFL Network.

“It is a legal hit,” Blandino said. “It’s an unfortunate result, something that the competition committee will continue to look at, as we do all injuries during the season. But it is a legal hit.”

Blandino said the committee will review the Swearinger hit as part of its ongoing effort to find ways to make the game safer.

Photo: Smiley N. Pool / Houston Chronicle

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Texans 24, Dolphins 17

J.J. Watt takes the field for the Texans preseason opener against the Dolphins.

Texans 24, Dolphins 17

J.J. Watt takes the field for the Texans preseason opener against the Dolphins.